Maintenace & Repair Solutions
Maintenace & Repair Solutions
Heat Treatment Solutions
Let Our Experience Work For You
For more than thirty–five years, ProTech has been a leader in delivering reliable, code–compliant heat-treatment solutions to the industrial market. By understanding the unique challenges, standards, and expectations of every client, ProTech provides the assurance that each project and application is executed with precision, safety, and technical integrity.
Standard services include:
• Welding Preheat
• Post Weld Heat Treatment (PWHT)
• Line Thawing
• Hydrogen Baked-out
• Section VIII Vessel PWHT
• Refractory Dry Out
• Furnace Start-ups
• Phenolic Cures
• Bolt Heating
• Shrink Fits
• Stress Relieving
Resistance
ProTech-Solutions’ low-voltage electrical resistance heating elements feature a multi-zone control system that enables simultaneous thermal processing of multiple pipe welds. The advanced automated operating and recording system surpasses compliance with the most rigorous industry codes and client requirements.
Combustion
When an application requires significant heat input, ProTech’s High Velocity Combustion Heat Treatment System is deployed. This method is most commonly used for refractory force curing, process furnace start-ups, vessel post‑weld heat treatment, and phenolic coating cures. The system incorporates all safety features required by NFPA and can operate on either LPG or natural gas.
Induction
When an application requires a concentrated, uniform heat source, ProTech’s Induction Heating System is the answer. By generating an electromagnetic field heating solution around the object to be treated, ProTech’s induction system provides an ideal solution for bolt heating / stud removal and shrink fit applications.
Resistance
ProTech’s Electrical Resistance Heat Treatment method uses low-voltage flexible ceramic heating elements applied directly to the pipe or vessel requiring heat treatment. The heating elements are configured according to component geometry and weld zones, then set up and controlled by thermocouples attached to the pipe or vessel and connected to an automated temperature-control console. This system maintains tight temperature tolerances, reduces harmful thermal gradients, and complies with AWS D10.10, ASME B31.3, WRC 452, and API RP 945.
Standard Applications:
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Controlled Welding Preheat Services for documentation of time/temperature during the welding process
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Post Weld Heat Treatment (PWHT) to reduce thermal stresses created during the welding process
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Restore the flow of solidified lines by temporarily heating areas until product flow is established (Line Thaw Heat Treatment)
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Decontaminated “bake out” pipes and vessels that once held toxic materials
Combustion
The engineering foundation of ProTech’s burner design – featuring a 100:1 turn down ratio, outlet sizes range from 1.5 to 10 inches and controlled excess air – ensures our ability to safely execute any Combustion Heat Treatment process with precision control. By measuring both air and surface temperatures, ProTech ensures that temperature tolerances are maintained and the structure meets its critical temperature for the required soak period. In unique situations, supplementary heat sources to nozzles, branch connections, or isolated zones may require use of electrical resistance heating to ensure proper thermal gradient parameters are achieved during temperature increase.
To assure safe execution, ProTech Combustion Control System is equipped with a flame failure unit, safety interlocks, and purge timers, all of which are tested prior to mobilization to a client’s site.
Standard applications:
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Refractory Dry-out to remove chemically held water before placing into service
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Post weld Heat Treatment of ASME Section VIII Vessels in a temporary furnace or internally fired
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Phenolic cures of vessel linings
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Process start-ups of furnaces and components when a low temperature and controlled rise are critical
Induction
ProTech’s Induction Heat Treatment system uses a coil or induction rod, wrapped around or inserted into the component, to create an electromagnetic field that generates heat within the material itself. The process delivers rapid, highly focused heating, allowing the coil and surrounding areas to remain comparatively cool while the component reaches its required temperature.
Standard Applications:
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Bolt Heating to elongate the stud or nut to be removed
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Shrink Fit Applications of journals and shafts
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Post Weld Heat Treatment of components when resistance heaters are not practical
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Line Thaw Heat Treatment requiring narrow areas to be heated while adjacent areas remain ambient
